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Output MIME parameter micalg according to RFC3851 and RFC4490 instead of hard

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coding it to "sha1".
This commit is contained in:
Dr. Stephen Henson 2006-06-06 13:27:36 +00:00
parent 61e5ec4b1e
commit fb7b393278
2 changed files with 84 additions and 1 deletions
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4
CHANGES
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@ -4,6 +4,10 @@
Changes between 0.9.8b and 0.9.9 [xx XXX xxxx]
*) Add additional S/MIME capabilities for AES and GOST ciphers if supported.
Use correct micalg parameters depending on digest(s) in signed message.
[Steve Henson]
*) Add engine support for EVP_PKEY_ASN1_METHOD. Add functions to process
an ENGINE asn1 method. Support ENGINE lookups in the ASN1 code.
[Steve Henson]

81
crypto/pkcs7/pk7_mime.c
View File

@ -144,6 +144,83 @@ static PKCS7 *B64_read_PKCS7(BIO *bio)
return p7;
}
/* Generate the MIME "micalg" parameter from RFC3851, RFC4490 */
static int pk7_write_micalg(BIO *out, PKCS7 *p7)
{
STACK_OF(X509_ALGOR) *mdalgs;
STACK *mic_sk;
int i, have_unknown = 0, ret = 0;
mdalgs = p7->d.sign->md_algs;
mic_sk = sk_new_null();
if (!mic_sk)
goto err;
have_unknown = 0;
for (i = 0; i < sk_X509_ALGOR_num(mdalgs); i++)
{
switch(OBJ_obj2nid(sk_X509_ALGOR_value(mdalgs, i)->algorithm))
{
case NID_sha1:
if (!sk_push(mic_sk, "sha1"))
goto err;
break;
case NID_md5:
if (!sk_push(mic_sk, "md5"))
goto err;
break;
case NID_sha256:
if (!sk_push(mic_sk, "sha-256"))
goto err;
break;
case NID_sha384:
if (!sk_push(mic_sk, "sha-384"))
goto err;
break;
case NID_sha512:
if (!sk_push(mic_sk, "sha-512"))
goto err;
break;
case NID_id_GostR3411_94:
if (!sk_push(mic_sk, "gostr3411-94"))
goto err;
break;
default:
if (!have_unknown)
{
if (!sk_push(mic_sk, "unknown"))
goto err;
have_unknown = 1;
}
break;
}
}
for (i = 0; i < sk_num(mic_sk); i++)
{
BIO_puts(out, sk_value(mic_sk, i));
if (i > 0)
BIO_write(out, ",", 1);
}
ret = 1;
err:
if (mic_sk)
sk_free(mic_sk);
return ret;
}
/* SMIME sender */
int SMIME_write_PKCS7(BIO *bio, PKCS7 *p7, BIO *data, int flags)
@ -174,7 +251,9 @@ int SMIME_write_PKCS7(BIO *bio, PKCS7 *p7, BIO *data, int flags)
BIO_printf(bio, "MIME-Version: 1.0%s", mime_eol);
BIO_printf(bio, "Content-Type: multipart/signed;");
BIO_printf(bio, " protocol=\"%ssignature\";", mime_prefix);
BIO_printf(bio, " micalg=sha1; boundary=\"----%s\"%s%s",
BIO_puts(bio, " micalg=\"");
pk7_write_micalg(bio, p7);
BIO_printf(bio, "\"; boundary=\"----%s\"%s%s",
bound, mime_eol, mime_eol);
BIO_printf(bio, "This is an S/MIME signed message%s%s",
mime_eol, mime_eol);